HYBRID / BATTERY CONTROL HYBRID CONTROL SYSTEM P0AE173 Hybrid/EV Battery Precharge Contactor Actuator Stuck Closed
DTC SUMMARY
MALFUNCTION DESCRIPTION
The hybrid vehicle control ECU assembly detects a stuck closed malfunction of a precharge relay on the HV battery negative side.
The cause of this malfunction may be one of the following:
Voltage sensor (VH) malfunction
Motor generator control ECU (MG ECU) malfunction
Communication (wire harness) malfunction
HV battery junction block assembly malfunction
Hybrid vehicle control ECU assembly malfunction
HV battery junction block assembly malfunction
Low voltage wire harness malfunction
Low voltage connector malfunction
DESCRIPTION
Refer to the description for DTC P0AE411.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Warning Indicate | Note |
|---|---|---|---|---|---|---|
| P0AE173 | Hybrid/EV Battery Precharge Contactor Actuator Stuck Closed | Even if the SMRP (precharge relay) of HV battery negative (-) terminal side is turned off, the inverter voltage (VH) does not drop.
(2 trip detection logic) |
·
HV battery junction block assembly ·
Inverter with converter assembly ·
Hybrid vehicle control ECU assembly ·
Wire harness or connector |
Does not come on | Master Warning:
Comes on |
SAE Code:
P0AE2 |
| DTC No. | Data List |
|---|---|
| P0AE173 | ·
Hybrid/EV Battery Voltage ·
VH-Voltage after Boosting ·
VL-Voltage before Boosting |
CONFIRMATION DRIVING PATTERN
- HINT:
-
After repair has been completed, clear the DTC and then check that the vehicle has returned to normal by performing the following All Readiness check procedure.
Connect the GTS to the DLC3.
Turn the power switch on (IG) and turn the GTS on.
Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
Turn the power switch off and wait for 2 minutes or more.
Turn the power switch on (IG) and turn the GTS on.
Turn the power switch on (READY) and wait for 3 minutes or more.
- HINT:
-
According to the display on the GTS, read the Data List and monitor the values of "Hybrid/EV Battery Voltage" and "VL-Voltage before Boosting" for 3 minutes. If the difference between "Hybrid/EV Battery Voltage" and "VL-Voltage before Boosting" is always less than 100 V, the vehicle has returned to normal.
Enter the following menus: Powertrain / Hybrid Control / Utility / All Readiness.
Check the DTC judgment result.
- HINT:
- ·
If the judgment result shows NORMAL, the system is normal.
·If the judgment result shows ABNORMAL, the system has a malfunction.
·If the judgment result shows INCOMPLETE, perform driving pattern again.
WIRING DIAGRAM
Refer to the wiring diagram for the HV battery high-voltage line circuit.
CAUTION / NOTICE / HINT
- CAUTION:
-
Refer to the precautions before inspecting high voltage circuit.
- NOTICE:
-
If the DTCs are cleared or the cable is disconnected and reconnected to the negative (-) auxiliary battery terminal before performing repairs, turning the power switch on (READY) may cause a malfunction. Do not turn the power switch on (READY).
PROCEDURE
Connect the GTS to the DLC3.
Turn the power switch on (IG).
Enter the following menus: Powertrain / Hybrid Control and Motor Generator / Trouble Codes.
Check for DTCs.
- Powertrain > Hybrid Control > Trouble Codes
- 50001 397
- Powertrain > Motor Generator > Trouble Codes
- 50001 395
- Result:
Result Proceed to P0AE173 only is output, or DTCs except the ones in the table below are also output. A DTCs of hybrid control system in the tables below are output. B DTCs of motor generator control system in the tables below are output. C
| Malfunction Content | System | Relevant DTC | |
|---|---|---|---|
| Microcomputer malfunction | Hybrid control system | P060647 | Hybrid/EV Powertrain Control Module Processor Watchdog / Safety MCU Failure |
| P060687 | Hybrid/EV Powertrain Control Module Processor to Monitoring Processor Missing Message | ||
| P060A47 | Hybrid/EV Powertrain Control Module Monitoring Processor Watchdog / Safety MCU Failure | ||
| P060A87 | Hybrid/EV Powertrain Control Module Processor from Monitoring Processor Missing Message | ||
| P0A1B49 | Drive Motor "A" Control Module Internal Electronic Failure | ||
| P1C9E9F | Hybrid/EV System Reset Stuck Off | ||
| Motor generator control system | P0A1B1F | Generator Control Module Circuit Intermittent | |
| P0A1A47 | Generator Control Module Watchdog / Safety MC Failure | ||
| P0A1A49 | Generator Control Module Internal Electronic Failure | ||
| P1C2A1C | Generator A/D Converter Circuit Circuit Voltage Out of Range | ||
| P1C2A49 | Generator A/D Converter Circuit Internal Electronic Failure | ||
| P1C2B1C | Drive Motor "A" Control Module A/D Converter Circuit Voltage Out of Range | ||
| P1C2B49 | Drive Motor "A" Control Module A/D Converter Circuit Internal Electronic Failure | ||
| P1CAC49 | Generator Position Sensor Internal Electronic Failure | ||
| P1CAD49 | Drive Motor "A" Position Sensor Internal Electronic Failure | ||
| P1CAF38 | Generator Position Sensor REF Signal Cycle Malfunction Signal Frequency Incorrect | ||
| P1CB038 | Drive Motor "A" Position Sensor REF Signal Frequency Incorrect | ||
| P313383 | Communication Error from Generator to Drive Motor "A" Value of Signal Protection Calculation Incorrect | ||
| P313386 | Communication Error from Generator to Drive Motor "A" Signal Invalid | ||
| P313387 | Communication Error from Generator to Drive Motor "A" Missing Message | ||
| Power source circuit malfunction | Motor generator control system | P06D61C | Generator Control Module Offset Power Circuit Voltage Out of Range |
| P06B01C | Generator Control Module Position Sensor REF Power Source Circuit Voltage Out of Range | ||
| Communication system malfunction | Hybrid control system | P312387 | Lost Communication with Drive Motor Control Module "A" from Hybrid/EV Control Module Missing Message |
| Sensor and actuator circuit malfunction | Hybrid control system | P0AD911 | Hybrid/EV Battery Positive Contactor Circuit Short to Ground |
| P0AD915 | Hybrid/EV Battery Positive Contactor Circuit Short to Auxiliary Battery or Open | ||
| P0ADD11 | Hybrid/EV Battery Negative Contactor Circuit Short to Ground | ||
| P0ADD15 | Hybrid/EV Battery Negative Contactor Circuit Short to Auxiliary Battery or Open | ||
| P0AE411 | Hybrid/EV Battery Precharge Contactor Circuit Short to Ground | ||
| P0AE415 | Hybrid/EV Battery Precharge Contactor Circuit Short to Auxiliary Battery or Open | ||
| Motor generator control system | P0A3F16 | Drive Motor "A" Position Sensor Circuit Voltage Below Threshold | |
| P0A4B16 | Generator Position Sensor Circuit Voltage Below Threshold | ||
| P0A4B21 | Generator Position Sensor Signal Amplitude < Minimum | ||
| P0A4B22 | Generator Position Sensor Signal Amplitude > Maximum | ||
| P0C5013 | Drive Motor "A" Position Sensor Circuit "A" Circuit Open | ||
| P0C5016 | Drive Motor "A" Position Sensor Circuit "A" Circuit Voltage Below Threshold | ||
| P0C5017 | Drive Motor "A" Position Sensor Circuit "A" Circuit Voltage Above Threshold | ||
| P0C5A13 | Drive Motor "A" Position Sensor Circuit "B" Circuit Open | ||
| P0C5A16 | Drive Motor "A" Position Sensor Circuit "B" Circuit Voltage Below Threshold | ||
| P0C5A17 | Drive Motor "A" Position Sensor Circuit "B" Circuit Voltage Above Threshold | ||
| P0C6413 | Generator Position Sensor Circuit "A" Circuit Open | ||
| P0C6416 | Generator Position Sensor Circuit "A" Circuit Voltage Below Threshold | ||
| P0C6417 | Generator Position Sensor Circuit "A" Circuit Voltage Above Threshold | ||
| P0C6913 | Generator Position Sensor Circuit "B" Circuit Open | ||
| P0C6916 | Generator Position Sensor Circuit "B" Circuit Voltage Below Threshold | ||
| P0C6917 | Generator Position Sensor Circuit "B" Circuit Voltage Above Threshold | ||
| System malfunction | Hybrid control system | P0D2D1C | Drive Motor "A" Inverter Voltage Sensor Voltage Out of Range |
| P1C8349 | High Voltage Power Resource Circuit Voltage Sensor after Boosting Malfunction | ||
| P0C7600 | Hybrid/EV Battery System Discharge Time Too Long | ||
| Motor generator control system | P0D2D16 | Drive Motor "A" Inverter Voltage Sensor (VH) Circuit Voltage Below Threshold | |
| P0D2D17 | Drive Motor "A" Inverter Voltage Sensor (VH) Circuit Voltage Above Threshold | ||
| P1CB69E | Drive Motor "A" Inverter Voltage Sensor (VH) Stuck On | ||
- HINT:
- ·
P0AE173 may be output as a result of the malfunction indicated by the DTCs above.
(a)The chart above is listed in inspection order of priority.
(b)Check DTCs that are output at the same time by following the listed order. (The main cause of the malfunction can be determined without performing unnecessary inspections.)
Turn the power switch off.
A
B
C
for 2WD:
for AWD:
Connect the GTS to the DLC3.
Turn the power switch on (IG).
Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.
Read the freeze frame data of DTC P0AE173.
- Powertrain > Hybrid Control > Trouble Codes
- 50001 397
- NOTICE:
-
As freeze frame data is stored immediately before and after a DTC is stored, make sure to only read the values for the moment the DTC was stored ("0(s)").
- Result:
Result Proceed to Difference between "VL-Voltage before Boosting" and "VH-Voltage after Boosting" is less than 76 V. A Difference between "VL-Voltage before Boosting" and "VH-Voltage after Boosting" is 76 V or more. B
- HINT:
-
If VH-Voltage after Boosting is output even when an off command is being sent to the system main relay (positive side), P0AE173 is output. If the difference between the "VL-Voltage before Boosting" and the "VH-Voltage after Boosting" is large, it is determined that there is an inverter (VH sensor) malfunction.
Turn the power switch off.
A
B
for 2WD:
for AWD:
- Result:
Proceed to OK NG
OK
NG
- Result:
Proceed to NEXT
NEXT
- Result:
Result Proceed to OK A NG (The connector is not connected securely.) B NG (The terminals are not making secure contact or are deformed, or water or foreign matter exists in the connector.) C
A
B
C
- Result:
Proceed to NEXT
NEXT
- Result:
Proceed to NEXT
NEXT
- Result:
Proceed to OK NG
OK
NG
- Result:
Proceed to NEXT
NEXT
- Result:
Proceed to OK NG
OK
NG
- Result:
Proceed to NEXT
NEXT
- CAUTION:
-
Be sure to wear insulated gloves.
Check that the service plug grip is not installed.
- NOTICE:
-
After removing the service plug grip, do not turn the power switch on (READY), unless instructed by the repair manual because this may cause a malfunction.
Remove the No. 1 HV battery cover panel RH.
Disconnect the M32 HV battery junction block assembly connector.
Disconnect the A30 hybrid vehicle control ECU assembly.
| *a | Front view of wire harness connector
(to Hybrid Vehicle Control ECU Assembly) |
| *b | Front view of wire harness connector
(to HV Battery Junction Block Assembly) |
Measure the resistance according to the value(s) in the table below.
- Standard Resistance (Check for Open):
Tester Connection Condition Specified Condition A30-16 (SMRP) - M32-2 (SMRP) Power switch off Below 1 Ω
- Standard Resistance (Check for Short):
Tester Connection Condition Specified Condition A30-16 (SMRP) or M32-2 (SMRP) - Body ground and other terminals Power switch off 10 kΩ or higher
Reconnect the A30 hybrid vehicle control ECU assembly.
Reconnect the M32 HV battery junction block assembly connector.
Install the No. 1 HV battery cover panel RH.
- Result:
Proceed to OK NG
OK
NG
- Result:
Proceed to NEXT
NEXT
- Result:
Proceed to OK NG
OK
NG
- Result:
Proceed to NEXT
NEXT
- CAUTION:
-
Be sure to wear insulated gloves.
Check that the service plug grip is not installed.
- NOTICE:
-
After removing the service plug grip, do not turn the power switch on (READY), unless instructed by the repair manual because this may cause a malfunction.
Remove the No. 1 HV battery cover panel RH.
Disconnect the M32 HV battery junction block assembly connector.
Measure the resistance according to the value(s) in the table below.
| *a | Component without harness connected
(HV Battery Junction Block Assembly) |
- | - |
- Standard Resistance:
Tester Connection Condition Specified Condition M32-2 (SMRP) - M32-3 (GND) -40 to 80°C (-40 to 176°F) 140 to 290 Ω
Reconnect the M32 HV battery junction block assembly connector.
Install the No. 1 HV battery cover panel RH.
- Result:
Proceed to OK NG
OK
NG
- CAUTION:
-
Be sure to wear insulated gloves.
Check that the service plug grip is not installed.
- NOTICE:
-
After removing the service plug grip, do not turn the power switch on (READY), unless instructed by the repair manual because this may cause a malfunction.
Remove the No. 1 HV battery cover panel RH.
Disconnect the 2 floor under wire connectors from the HV battery junction block assembly.
Disconnect the 2 HV battery high voltage connectors from the HV battery junction block assembly.
- NOTICE:
-
Insulate each disconnected high-voltage connector with insulating tape. Wrap the connector from the wire harness side to the end of the connector.
| *a | Component without harness connected
(HV Battery Junction Block Assembly) |
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition Y4-1 (CEI) - z21-1 (-) Power switch off 10 kΩ or higher
- HINT:
- ·
If a system main relay is stuck closed, inspect the HV battery junction block assembly without removing it from the vehicle, in order to keep the relay closed.
·If the result of reading the freeze frame data is A, the HV battery junction block assembly must be replaced. Measuring resistance can determine that this is either a present or past malfunction.
Reconnect the 2 HV battery high voltage connectors.
Reconnect the 2 floor under wire connectors.
Install the No. 1 HV battery cover panel RH.
- Result:
Result Judgment Proceed to OK Past malfunction A NG Present malfunction B
A
B
- Result:
Proceed to NEXT
NEXT
- Result:
Proceed to NEXT
NEXT
- Result:
Proceed to NEXT
NEXT
- Result:
Result Proceed to Difference between "Hybrid/EV Battery Voltage" and "VL-Voltage before Boosting" is always less than 100 V. A Difference between "Hybrid/EV Battery Voltage" and "VL-Voltage before Boosting" is 100 V or more. B
A
B
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